Original Articles |
|
|
|
|
Improvement of Efficiency and Brightness of Red Organic Light-Emitting Devices Using Double-Quantum-Well Configuration |
MI Rui;CHENG Gang;ZHAO Yi;XIE Wen-Fa;HOU Jing-Ying;DING Tao;LIU Shi-Yong |
National Laboratory of Integrated Optical Electronics, Jilin University, Changchun 130023
Department of Materials Science, Jilin University, Changchun 130023 |
|
Cite this article: |
MI Rui, CHENG Gang, ZHAO Yi et al 2004 Chin. Phys. Lett. 21 556-558 |
|
|
Abstract We present red double-quantum-well organic light-emitting devices (DQW-OLEDs), in which N,N-bis-(1-naphthyl)-N,N'-diphenyl-1,1'-biphenyo-4,4'-diamine (NPB) is used as potential barriers and hole transport layer, 4-(dicyanome-thylene)-2-t-butyl-6-(1,1,7,7-thtramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) doped tris (8-hydroxyquinoline) aluminium (Alq3) as potential wells and emitter, undoped Alq3 as electron transport layer, respectively. The turn-on voltage is about 4 V. The maximum brightness and electroluminescent (EL) efficiency of the DQW device can reach 5916 cd m-2 at 16 V and 2.85 cd A-1 at 7 V, respectively. In addition, the EL efficiency of the DQW device is relatively independent of the drive voltage in the range from 5 V to 16 V.
|
Keywords:
78.60.Fi
78.66.Qn
85.60.Jb
|
|
Published: 01 March 2004
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|